private void OnAddProjectButtonClick()
{
var p = MProject.CreateInstance <MProject>();
p.name = Guid.NewGuid().ToString();
p.ProjectName = "Project " + (this.sceneContainer.projects.Count + 1);
AssetDatabase.AddObjectToAsset(p, this.sceneContainer);
this.sceneContainer.projects.Add(p);
EditorUtility.SetDirty(this.sceneContainer);
AssetDatabase.SaveAssets();
projectList.selectedIndex = this.sceneContainer.projects.Count - 1;
}